Manually backport release notes to 2.x

[mengweieric]

Description

Backport release notes to 2.x.

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #462 (383c000) into 2.x (0538e50) will decrease coverage by 2.40%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x     #462      +/-   ##
============================================
- Coverage     76.52%   74.12%   -2.41%     
- Complexity        0      383     +383     
============================================
  Files            30       94      +64     
  Lines          1947     4008    +2061     
  Branches        420      649     +229     
============================================
+ Hits           1490     2971    +1481     
- Misses          454      903     +449     
- Partials          3      134     +131     

Flag	Coverage Δ
dashboards-reports	76.52% <ø> (ø)
reports-scheduler	71.85% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rch/reportsscheduler/index/ReportInstancesIndex.kt	52.52% <0.00%> (ø)
...reportsscheduler/model/GetReportInstanceRequest.kt	92.85% <0.00%> (ø)
...rtsscheduler/action/GetAllReportInstancesAction.kt	100.00% <0.00%> (ø)
...eportsscheduler/model/GetReportInstanceResponse.kt	88.88% <0.00%> (ø)
...tsscheduler/scheduler/ReportDefinitionJobParser.kt	100.00% <0.00%> (ø)
...heduler/model/UpdateReportInstanceStatusRequest.kt	67.44% <0.00%> (ø)
...sscheduler/action/GetAllReportDefinitionsAction.kt	100.00% <0.00%> (ø)
...tsscheduler/action/DeleteReportDefinitionAction.kt	100.00% <0.00%> (ø)
...search/reportsscheduler/security/SecurityAccess.kt	0.00% <0.00%> (ø)
...search/reportsscheduler/settings/PluginSettings.kt	78.33% <0.00%> (ø)
... and 54 more

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